Analysis of the state of physiology of untruth in prefrontal cortex measured by functional near-infared spectroscopy (F-NIRS)

Abstract

Truthful and deceptive responses are socially and legally important behavior. In a recent

year, brain imaging measurements were applied to find deception response. However, with these brain imaging techniques, the cognitive brain activities can be determined with stressful for participants. In this study, the pattern of brain activity is characterized with multi - channel near – infrared spectroscopy (NIRS) in the region of dorsolateral prefrontal cortex which is related to response of lying. The sample consisted of two undergraduate students. The subject had to perform specific truthful and deceptive responses tasks by choosing cards. We found the location of deceptive task which was chosen randomly by the participant. The method of deceptive detection was computed by the area under the curve in the change in concentration oxygenated hemoglobin (HbO2) during specific time of performance in task. The study found that the right group of channels was indicated deceptive task as maximum area value under the curve in the concentration change of HbO2. Key word: truthful response, deceptive response, dorsolateral prefrontal cortex, Near

Infrared Spectroscopy (NIRS)